yeah, i definitely recommend getting to 3 days and onset of ketosis
i think part of the reason why it's helped me so much is it has literally taken a chunk out of the damage that decades of alcohol and sugar/starch have done and unlocked some of my liver's living capacity that i had not hade use of in a long time
but beware, ketosis is kinda scary, you get hot, a bit dizzy, weak, a bit mentally confused, your pee smells weird and you may also notice your breath smells weird
i expect that as one repeats thet process the amount of shock of it reduces and each time probably you claw back some more of your liver and kidney function
that's the other thing, gotta stay hydrated, fasting you need hydration but when you get into ketosis you need it 2x more